EP0176455B1 - Elektro-mechanische Schaltvorrichtung - Google Patents

Elektro-mechanische Schaltvorrichtung Download PDF

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Publication number
EP0176455B1
EP0176455B1 EP85420163A EP85420163A EP0176455B1 EP 0176455 B1 EP0176455 B1 EP 0176455B1 EP 85420163 A EP85420163 A EP 85420163A EP 85420163 A EP85420163 A EP 85420163A EP 0176455 B1 EP0176455 B1 EP 0176455B1
Authority
EP
European Patent Office
Prior art keywords
plate
mobile
contacts
insulating
insulating plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP85420163A
Other languages
English (en)
French (fr)
Other versions
EP0176455A1 (de
Inventor
Jean Pierre Cinquin
Christian Garrola
Michel Pisciotta
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ferraz SA
Original Assignee
Ferraz SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ferraz SA filed Critical Ferraz SA
Publication of EP0176455A1 publication Critical patent/EP0176455A1/de
Application granted granted Critical
Publication of EP0176455B1 publication Critical patent/EP0176455B1/de
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/32—Insulating body insertable between contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/222—Power arrangements internal to the switch for operating the driving mechanism using electrodynamic repulsion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/10—Adaptation for built-in fuses
    • H01H9/106—Adaptation for built-in fuses fuse and switch being connected in parallel

Definitions

  • the present invention relates to electro-mechanical devices which include a fuse cartridge and which are used in the art as switches or circuit breakers.
  • Such an apparatus in principle comprises fixed contacts, one or more corresponding movable contacts, a coil capable of controlling the movement of the latter and a relatively small caliber fuse cartridge, mounted in parallel on the contact system.
  • the coil When the coil is energized, it repels by Thomson effect a conductive plate secured to the movable contacts, which are then retained in the open position by engaging a comb, ratchet or the like.
  • the circuit formed by the fixed and movable contacts is thus cut under a low voltage and all the current passes through the cartridge which melts with a very small delay, but sufficient for the contacts to have separated at least in large part. The rupture arc is thus established inside the cartridge where it is absorbed by the filling material thereof.
  • the contact carrier insulating plate is pushed back by the plate without being linked to it while the stroke of said plate is stopped by a fixed stop which allows the plate to continue its movement by kinetic energy effect until 'that it is retained in the open position of the movable contacts by a latching bolt system.
  • the circuit breaker shown comprises two fixed contacts formed by the opposite ends of two bars 1 arranged coaxially with a small separation interval in the longitudinal direction.
  • Bolts 2 fix these bars to an inverted upper insulating bowl 3.
  • a flat circular coil 4 which bears against ribs 3a of the aforementioned bottom.
  • the coil 4 is suitably coated with insulation so as to constitute a rigid part.
  • a circular movable plate 6 made of a very good conductive and relatively light metal, such as aluminum.
  • the plate 6 is biased towards the bottom by a spring 7 which bears against the bottom of the housing 3, coaxially with the coil 4, but it is retained against the action of this spring by the upper edge of a vertical insulating plate 8 which, passing through the partition 5a, passes between the fixed contacts 1 to come to bear against a series of movable contacts 9 that springs 10 keep applied against said fixed contacts 1.
  • the lower edge of the plate 8 is cut from a series of notches in which the movable contacts 9 are engaged and which cause this part of the plate 8 to somewhat affect the shape of a comb.
  • Each contact 9 is itself hollowed out by a notch 9a in which a tooth bottom of this profile engages, so that the contact 9 considered is retained relative to the plate 8 longitudinally and transversely. It is further provided for each contact 9 two springs 10 located on either side of the mean plane of the plate 8, these springs being engaged on centering pins 11 integral with the bottom 12a of a lower housing 12 to profile in rectangular plan, whose edges 12b, folded horizontally, are fixed to the contacts or bars 1 by bolts 13.
  • the reaction of the springs 10 is sufficient to keep the plate 6 applied with a small clearance under the coil 4, despite the presence of the spring 7, the movable contacts 9 bearing against the fixed contacts 1 with the desired pressure and non-obstant les inevitable manufacturing and mounting tolerances.
  • the plate 6 When the coil 4 is traversed by a sufficiently strong current pulse, the plate 6 is pushed back down by Thomson effect against the springs 10. It lowers until it comes to abut against an inner edge 5b of the part 5, while the plate 8 continues its downward stroke under the effect of kinetic energy by moving the movable contacts 9 away from the fixed contacts 1, to come to engage in the lowered position under the effect of a bolt 14, pushed back by a spring 15, the end of this bolt engaging in a notch 8a of the plate.
  • the plate 8 is guided in its downward movement on the one hand by the partition 5a which it crosses with reduced clearance, on the other hand by vertical ribs 12c provided inside the housing 12 (see fig. 2 and 3 ).
  • the bolt 14 it rests on a lowered part 5c of the partition 5a (see fig. 3) and can move under two flanges 5d thereof. It has on its underside a notch 14a, the flat bottom of which bears on a rod 16.
  • the rod 16 extends parallel to the largest horizontal dimension of the lower housing 12 as far as the wall of the upper bowl 3 in order to be connected by welding to a control lever 17 rotatably mounted on a stud 18, l 'lower end of this lever protruding below the stud to end with an operating button 19.
  • the stud 18 is pressed into a lateral boss of the lower housing 12 and which is suitably notched to allow passage of the lever 17 as well as the slight angular clearance necessary for operation (fig. 2 and 3).
  • the plate 8 is driven down by lowering the movable contacts 9 and it comes to engage with the bolt 14 by its notch 5a (position shown in fig . 4).
  • the button 19 When it is desired to close the circuit, it suffices to operate the button 19 in the desired direction to move the rod 16 to the right in FIG. 1. This rod pushes the bolt 14 against the spring 15 and thus releases the plate 8 which rises under the effect of the springs 10.
  • each bar or fixed contact 1 is screwed a vertical rod 20 which extends downwards through a tubular spacer 21, its lower end receiving a nut 22 which makes it possible to tighten against the spacer 21 one of the two knives flat of a fuse cartridge 24, which is thus bypassed on the mobile contact system 9.
  • the rods 20 and the spacers 21 are long enough for the cartridge to be easily housed under the lower housing 12.
  • an insulating lower cover 25 capable of enclosing the cartridge.
  • This cover made of insulating material, is articulated at the edge of the housing 12 by means of an axis 26. Its end opposite this axis has a flange 25a which engages in an appropriate retaining part very schematically indicated in mixed lines in 27.
  • the circuit breaker just described is completely enclosed and therefore does not present any danger. However, it remains perfectly accessible, especially for changing the cartridge after switching off. Thanks to the insulating plate 8 which is inserted between the fixed contacts 1 at the time of opening, any risk of direct arcing between arcs is eliminated and moreover these contacts 1 can be extremely close together, which reduces the dimensions and mass of the movable contacts 9, thereby speeding up operation.

Landscapes

  • Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Fuses (AREA)

Claims (8)

1. Elektromechanische Schaltvorrichtung mit einander im wesentlichen gegenüberliegend angeordneten Festkontakten (1), zwischen denen eine mit einem Satz bewegbarer, die Festkontakte im Normal betrieb schließende Kontakte (9) versehene Isolierplatte (8) eingefügt ist; mit einer Spule (4), die im erregten Zustand durch den Thomson-Effekt eine plötzliche Verlagerung einer mit besagter Isolierplatte zusammenwirkenden Scheibe (6) auslöst derart, daß deren bewegbare Kontakte (9) in eine geöffnete Position übergeführt werden; mit einem Klinkenriegel (14 - 15) zum Halten dieser Platte in dieser Position gegen Rückstellmittel sowie mit einer parallel zu dem System von festen und bewegbaren Kontakten geschalteten Schmelzpatrone (24) von verhältnismäßig niedriger Ansprechschwelle, die mit sehr geringer Verzögerung anspricht, wenn das System der Kontakte geöffnet wird, dadurch gekennzeichnet, daß die Kontaktträger-Isolierplatte {8) durch die Scheibe (6) zurückgestoßen wird, ohne mit dieser verbunden zu sein, wobei die Platte (8) unter der Wirkung ihrer kinetischen Energie ihre Bewegung solange fortsetzt, bis sie in geöffneter Position durch einen Klinkenriegel (14 - 15) gehalten wird, während die Bewegung der Scheibe (6) durch einen festen Anschlag (5b) begrenzet ist.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Kante der Isolierplatte (8), die der mit der beweglichen Platte (6) zusammenwirkenden Kante entgegengerichtet ist, eine Reihe von Zähnen aufweist, in deren Zwischenräumen die bewegbaren Kontakten (9) gelagert sind, von denen jeder in seiner Mitte mit einer Kerbe (9a) versehen ist zum Eingriff in den entsprechenden Zahn-Zwischenraum der Platte, und auch jeder durch mindestens eine Feder (10), die im entgegengesetzten Sinn zu dem Druck wirkt, der durch die bewegliche Platte (6) ausgeübt wird, in Bezug auf diese in Position gehalten ist.
3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß für jeden beweglichen Kontakt (9) zwei Rückstellfedern (10) vorgesehen sind, die im Verhältnis zur Mittel ebene der Isolierplatte (8) symmetrisch angeordnet sind, wobei das äusserste Ende jeder dieser Federn, das zum entsprechenden bewegbaren Kontakt (9) gegengerichtet ist, zum Inneren der Vorrichtung positiv zentriert ist.
4. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Spule (4) zwischen einerseits dem Boden eines Isolierstückes (3) in Form einer umgekehrten Kapsel, das an den festen Kontakten (1) befestigt ist, und andererseits einem isolierenden Zwischenstück (5) von im wesentlichen zylindrischer Form angeordnet ist, wobei in dem Zwischenstück die bewegbare Scheibe (6) sich,durch einen Anschlag (5b) begrenzt, verschieben kann, während auf der entgegengerichteten Seite besagter fester Kontakte (1) ein Gehäuse (12) angebracht ist, das die beweglichen Kontakte (9) und ihre Rückstellfedern (10) umschliesst und das die Isolierplatte (8) aufnimmt, wenn die besagten beweglichen Kontakte (9) geöffnet sind.
5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die Isolierplatte (8) durch innenliegende Rippen (12c) geführt wird, die auf den inneren Seitenwandungen des Gehäuses (12) vorgesehen sind.
6. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß das Zwischenstück (5) mit einer querverlaufenden Trennwand (5a) kraftschlüssig verbunden ist, die die führung für die Isolierplatte (8) bildet und die den Klinkenriegel (14 - 15) trägt.
7. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die festen Kontakte auf ihrer der Spule (4) entgegengerichteten Fläche mit Kontaktsäulen (20, 21) versehen sind, die sich ausreichend weit von deren Fläche aus erstrecken, um die Kontaktmesser (23) der Schmelzpatrone (24) aufzunehmen.
8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß eine kippbare Isolierkappe (25) vorgesehen ist, die, in geschlossener Position, die gesamte Patrone (24) und ihre Kontaktsäulen (20, 21) umschließt.
EP85420163A 1984-09-07 1985-09-06 Elektro-mechanische Schaltvorrichtung Expired EP0176455B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8413958A FR2570217B1 (fr) 1984-09-07 1984-09-07 Dispositif de coupe-circuit electromecanique
FR8413958 1984-09-07

Publications (2)

Publication Number Publication Date
EP0176455A1 EP0176455A1 (de) 1986-04-02
EP0176455B1 true EP0176455B1 (de) 1988-08-10

Family

ID=9307640

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85420163A Expired EP0176455B1 (de) 1984-09-07 1985-09-06 Elektro-mechanische Schaltvorrichtung

Country Status (4)

Country Link
US (1) US4631508A (de)
EP (1) EP0176455B1 (de)
DE (1) DE3564356D1 (de)
FR (1) FR2570217B1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2621170A1 (fr) * 1987-09-25 1989-03-31 Merlin Gerin Disjoncteur-limiteur
ATE93647T1 (de) * 1988-06-27 1993-09-15 Acec Transport Sa Durch einen ausloesekreis betaetigter schnellschalter.
SE9900852D0 (sv) 1999-03-08 1999-03-08 Secheron Sa An electrical coil module, an electrical coil comprising such modules, an actuation mechanism including such a coil and a circuit breaker comprising such an actuation mechanism
FR2891397B1 (fr) * 2005-09-23 2007-10-26 Schneider Electric Ind Sas Dispositif de commutation comprenant un mecanisme d'actionnement ultra-rapide
WO2011144256A1 (en) * 2010-05-21 2011-11-24 Abb Research Ltd An actuator, circuit breaker and method therefor
EP3146548B1 (de) 2014-05-19 2018-12-05 ABB Schweiz AG Elektrisches strombegrenzendes hochgeschwindigkeitsschaltgerät
CN117334541B (zh) * 2023-12-01 2024-03-19 杭州高特电子设备股份有限公司 一种主动断开熔断器及断开方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1146430A (fr) * 1955-04-06 1957-11-12 Siemens Ag Appareil de branchement, en particulier pour interrupteurs électriques
US3128361A (en) * 1959-02-17 1964-04-07 Siemens Ag High current switch arrangement for quick break
FR1454452A (fr) * 1965-08-04 1966-02-11 Comp Generale Electricite Court-circuiteur
FR2454174A1 (fr) * 1979-04-09 1980-11-07 Merlin Gerin Contacteur a commande d'ouverture rapide sur defaut
US4370636A (en) * 1981-04-03 1983-01-25 General Electric Company Electromagnetic dual break contactor
DE3329617A1 (de) * 1982-09-10 1984-03-15 Naimer, Hubert Laurenz, 6612 Ascona Kontaktanordnung

Also Published As

Publication number Publication date
FR2570217A1 (fr) 1986-03-14
EP0176455A1 (de) 1986-04-02
US4631508A (en) 1986-12-23
DE3564356D1 (en) 1988-09-15
FR2570217B1 (fr) 1988-05-27

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